1320132221 has 4 divisors (see below), whose sum is σ = 1320223200. Its totient is φ = 1320041244.

The previous prime is 1320132211. The next prime is 1320132223. The reversal of 1320132221 is 1222310231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320132221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320132221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320132223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18311 + ... + 54548.

It is an arithmetic number, because the mean of its divisors is an integer number (330055800).

Almost surely, 2^1320132221 is an apocalyptic number.

It is an amenable number.

1320132221 is a deficient number, since it is larger than the sum of its proper divisors (90979).

1320132221 is an equidigital number, since it uses as much as digits as its factorization.

1320132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90978.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1320132221 is about 36333.6238352301. The cubic root of 1320132221 is about 1096.9979358600.

Adding to 1320132221 its reverse (1222310231), we get a palindrome (2542442452).

The spelling of 1320132221 in words is "one billion, three hundred twenty million, one hundred thirty-two thousand, two hundred twenty-one".